From 630fd874ce3cf45ee17f7b6c7d51572c6440f4e7 Mon Sep 17 00:00:00 2001
From: Dmitry Shirokov <deadrunk@gmail.com>
Date: Thu, 30 Jul 2026 12:06:07 +1000
Subject: [PATCH] fix(core): replace net dependency with local ip checks

---
 src/ip.test.ts |  2 +-
 src/ip.ts      | 26 +++++++++++++++++++++-----
 2 files changed, 22 insertions(+), 6 deletions(-)

diff --git a/src/ip.test.ts b/src/ip.test.ts
index 1dc7fc8..9caa31e 100644
--- a/src/ip.test.ts
+++ b/src/ip.test.ts
@@ -103,7 +103,7 @@ describe('lib/ip', () => {
     it('should work fine for IPv4', () => {
       assert.strictEqual(ip.validate('64.4.4.4'), true);
       assert.strictEqual(ip.validate('64.4.4.boom!'), false);
-      // @ts-ignore
+      // @ts-expect-error
       assert.strictEqual(ip.validate(undefined), false);
       assert.strictEqual(ip.validate('kraken'), false);
     });
diff --git a/src/ip.ts b/src/ip.ts
index ece598d..322b065 100755
--- a/src/ip.ts
+++ b/src/ip.ts
@@ -1,4 +1,23 @@
-import net from 'net';
+// Borrowed from https://github.com/nodejs/node/blob/main/lib/internal/net.js
+// IPv4 Segment
+const v4Seg = '(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])';
+const v4Str = `(?:${v4Seg}\\.){3}${v4Seg}`;
+const IPv4Reg = new RegExp(`^${v4Str}$`);
+
+// IPv6 Segment
+const v6Seg = '(?:[0-9a-fA-F]{1,4})';
+const IPv6Reg = new RegExp(
+  '^(?:' +
+    `(?:${v6Seg}:){7}(?:${v6Seg}|:)|` +
+    `(?:${v6Seg}:){6}(?:${v4Str}|:${v6Seg}|:)|` +
+    `(?:${v6Seg}:){5}(?::${v4Str}|(?::${v6Seg}){1,2}|:)|` +
+    `(?:${v6Seg}:){4}(?:(?::${v6Seg}){0,1}:${v4Str}|(?::${v6Seg}){1,3}|:)|` +
+    `(?:${v6Seg}:){3}(?:(?::${v6Seg}){0,2}:${v4Str}|(?::${v6Seg}){1,4}|:)|` +
+    `(?:${v6Seg}:){2}(?:(?::${v6Seg}){0,3}:${v4Str}|(?::${v6Seg}){1,5}|:)|` +
+    `(?:${v6Seg}:){1}(?:(?::${v6Seg}){0,4}:${v4Str}|(?::${v6Seg}){1,6}|:)|` +
+    `(?::(?:(?::${v6Seg}){0,5}:${v4Str}|(?::${v6Seg}){1,7}|:))` +
+    ')(?:%[0-9a-zA-Z-.:]{1,})?$'
+);
 
 const parseIPv4 = (input: string): number[] => {
   const ip = input.split('.', 4);
@@ -69,10 +88,7 @@ const bitAt = (rawAddress: Buffer | number[], idx: number): number => {
   return (rawAddress[bufIdx] >>> bitIdx) & 1;
 };
 
-const validate = (ip: string): boolean => {
-  const version = net.isIP(ip);
-  return version === 4 || version === 6;
-};
+const validate = (ip: string): boolean => IPv4Reg.test(ip) || IPv6Reg.test(ip);
 
 export default {
   bitAt,